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Accumulated Other Comprehensive Loss (Details) (USD $)
In Thousands, unless otherwise specified
Dec. 31, 2014
Jun. 30, 2014
Accumulated Other Comprehensive Loss [Abstract]    
Cumulative foreign currency translation adjustments $ (12,139)us-gaap_AccumulatedOtherComprehensiveIncomeLossForeignCurrencyTranslationAdjustmentNetOfTax $ (2,622)us-gaap_AccumulatedOtherComprehensiveIncomeLossForeignCurrencyTranslationAdjustmentNetOfTax
Unrealized hedging gains (losses), net of taxes 1,142us-gaap_AccumulatedOtherComprehensiveIncomeLossCumulativeChangesInNetGainLossFromCashFlowHedgesEffectNetOfTax (2,163)us-gaap_AccumulatedOtherComprehensiveIncomeLossCumulativeChangesInNetGainLossFromCashFlowHedgesEffectNetOfTax
Accumulated other comprehensive loss (10,997)us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax (4,785)us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax
Net unrealized hedging gains, tax expense (benefit) $ 265rden_AccumulatedOtherComprehensiveIncomeLossForeignCurrencyTranslationAdjustmentTaxExpenseBenefit $ (359)rden_AccumulatedOtherComprehensiveIncomeLossForeignCurrencyTranslationAdjustmentTaxExpenseBenefit